(1) Njirimara brazing nke ihe mejupụtara matrix aluminom gụnyere nkwado ihe dị n'ime (gụnyere wisker) na nkwado eriri. Ihe eji eme nkwado gụnyere B, CB, SiC, wdg.
Mgbe a na-agbaze ma kpoo ngwakọta matriks aluminom, matrix Al dị mfe imeghachi omume na usoro nkwado, dịka mgbasa ngwa ngwa nke Si na ígwè ihe na-ejupụta na ígwè ntọala na nhazi nke oyi akwa mkpofu na-agbawa agbawa. N'ihi nnukwu ọdịiche dị na oke mgbasa linear n'etiti Al na usoro nkwado, ikpo ọkụ brazing na-ezighi ezi ga-akpata nrụgide okpomọkụ na njikọ ahụ, nke dị mfe ibute mgbawa nkwonkwo. Na mgbakwunye, mmiri mmiri dị n'etiti ígwè ihe na-ejupụta na usoro nkwado adịghị mma, yabụ a ga-agwọ elu brazing nke ngwakọta ahụ ma ọ bụ mee ka ígwè ihe na-ejupụta rụọ ọrụ, a ga-ejikwa brazing vacuum ruo n'ókè o kwere mee.
(2) Enwere ike ịgbado ihe na usoro nhazi nke ihe mejupụtara matriks aluminom B ma ọ bụ SiC nke ejiri ihe ndị mejupụtara ya mee ka ọ dị nro, a pụkwara ịme ọgwụgwọ elu tupu ịgbado ọkụ site na ịkpụcha akwụkwọ ájá, ihicha ahịhịa waya, ịsa alkali ma ọ bụ mkpuchi nickel na-enweghị electro (mkpuchi ọkpụrụkpụ 0.05mm). Ígwè ihe e ji eme ihe bụ s-cd95ag, s-zn95al na s-cd83zn, nke ọkụ oxyacetylene dị nro na-ekpo ọkụ. Na mgbakwunye, enwere ike inweta ike nkwonkwo dị elu site na ịkpụcha brazing na solder s-zn95al.
Enwere ike iji ihe mkpuchi vacuum mee njikọ nke ihe mejupụtara matrix aluminum Short Fiber Reinforced 6061. Tupu a na-eme brazing, a ga-eji akwụkwọ abrasive 800 gwerie elu ya mgbe a gweri ya, wee jiri ya na ọkụ mgbe a sachara ya na acetone. A na-ejikarị ígwè a na-eme brazing Al Si eme brazing eme ihe. Iji gbochie mgbasa nke Si n'ime ígwè ntọala, enwere ike iji akwa mkpuchi aluminom foil dị ọcha kpuchie elu brazing nke ihe mejupụtara ya, ma ọ bụ ígwè a na-eme brazing b-al64simgbi (11.65i-15mg-0.5bi) nwere ike brazing dị ala. Oke okpomọkụ agbaze nke ígwè a na-eme brazing bụ 554 ~ 572 ℃, okpomọkụ brazing nwere ike ịbụ 580 ~ 590 ℃, oge brazing bụ nkeji 5, ike shear nke nkwonkwo karịrị 80mpa.
Maka ngwakọta matrix aluminom nke graphite nke ejiri ihe ndị mejupụtara ya mee ka ọ sie ike, ịchacha ihe n'ime ọkụ ikuku bụ ụzọ kachasị aga nke ọma ugbu a. Iji mee ka mmiri dị mma, a ga-eji ihe na-agbaze Al Si nke nwere Mg.
Dịka ọ dị na brazing aluminom vacuum, enwere ike ime ka mmiri dị na ngwakọta matrix aluminom ka mma nke ukwuu site n'itinye mg vapor ma ọ bụ Ti suction ma tinye ego ụfọdụ nke Mg.
Oge ozi: Jun-13-2022